Ashwaghanda
Also known as Withania somnifera.
Withania somnifera improves semen quality in men
https://www.ncbi.nlm.nih.gov/pubmed/21388887
Ashwaghanda boosts serum testosterone LH, reduces FSH and prolactin
https://www.ncbi.nlm.nih.gov/pubmed/19501822
https://www.ncbi.nlm.nih.gov/pubmed/23796876
Rat study: Ashwaghanda boosts hormones in opioid addicted rats
https://www.ncbi.nlm.nih.gov/pubmed/27441058